Whether you love your old DVDs, can't get enough of the hottest Hollywood hits, or want to watch movies outdoors on a big screen under the stars, our home video solutions give you the power – and the technology – you need to do it all. Our obtained results revealed the melt droplets dynamics on a horizontal substrate, the range of the critical angle, the laser energy distribution on an inclined substrate, and the humping formation mechanism.Watch the latest movies, sports and documentaries with a home theater, portable projector or 4K Blu-ray player from LG.
In our experiments, the critical angle existed between 36° and 38°, and a periodic appearance of the humping formation was observed at the inclination angle of 40°. The “critical angle” was defined as the maximum inclination angle when the single track without any humps. When the substrate was inclined, the laser energy distribution on the substrate was demonstrated. Besides, the melt droplets dynamics were driven by the surface tension, resisted by the inertia, and the spreading process was much faster than the solidification process. The results showed that several small melt droplets were generated in front of the melt pool on a horizontal substrate however, a similar phenomenon was not observed on an inclined substrate.
Besides, the image processing technique was implemented to extract the coaxial melt pool area. A paraxial high-speed camera and a coaxial industrial camera were applied to obtain the instantaneous images of the melt pool. This investigation aims to investigate the melt pool evolution on a substrate with different inclination angles. However, most of the research focused on a horizontal substrate, and only a little literature has reported the studies on an inclined substrate with a non-vertically irradiated laser beam. The melt pool evolution during the laser direct metal deposition (DMD) is intricate.
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